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Advances in 3D fusion of multimodal medical images: 3D reconstruction of bone, muscle, and ligament structures under load from radiographs and magnetic resonance imaging

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Research on Biomedical engineering 2025年第1期41卷 1-35页

作者： da Silva, Daniel S. Astolfi, Rodrigo S. Jagatheesaperumal, Senthil K. Selvaraj, Priyadharsini Russel, Newlin Shebiah de Albuquerque, Victor Hugo C. Post-Graduation Program of Medical Surgical Sciences Federal University of Ceara CE Fortaleza60455-970 Brazil Department of Teleinformatics Engineering Federal University of Ceara CE Fortaleza60455-970 Brazil Department of Electronics and Communication Engineering Mepco Schlenk Engineering College TN Sivakasi626005 India Department of Computer Science and Engineering Mepco Schlenk Engineering College TN Sivakasi626005 India

Purpose: Foot and ankle pathologies are among the most prevalent conditions within the human locomotor system. Imaging examinations are crucial for diagnosing, treating, and achieving satisfactory functional outcomes for these conditions. However, conventional imaging exams often fail to capture all the necessary details for precise analysis, necessitating the use of multiple imaging modalities to evaluate bones, ligaments, cartilage, and other structures. Objective: This research aims to explore computational technologies and algorithms for 3D reconstruction and fusion of foot and ankle images, alongside the analysis, segmentation, classification, and evaluation techniques applied to these images. Methods: The study investigates different computational approaches for 3D reconstruction and multimodal image fusion, integrating X-ray and MRI data. Advanced segmentation and classification techniques are applied to enhance the precision of structural assessment. Additionally, we assess the availability and quality of databases for training and validating these models. Results: Our findings highlight a significant gap in research concerning these specific applications, as well as a shortage of suitable databases for 3D reconstruction and fusion of images from X-rays and MRI. Conclusion: The study emphasizes the need for dedicated datasets and further research to develop effective computational solutions for multimodal foot and ankle imaging. © The Author(s), under exclusive licence to The Brazilian Society of Biomedical engineering 2025.

关键词： Magnetic resonance imaging

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Sodium niobate with high photocatalytic activity for the removal of organic dye and inactivation of Escherichia coli, Staphylococcus aureus, and Klebsiella pneumoniae bacteria: the effect of Zn doping on these properties

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Ceramics International 2025年

作者： Fernandes, Daiane Raubach, Cristiane Trassante, Carla Dias, Vagner Melo, Luize Silveira, Marcelle Carvalho, Ramon Moreira, Mario Jardim, Pedro Ferrer, Mateus Giongo, Janice Vaucher, Rodrigo Longo, Elson Cava, Sergio Post-Graduate Program in Materials Science and Engineering Federal University of Pelotas RS Pelotas96010-610 Brazil Post-Graduate Program in Microbiology and Parasitology Federal University of Pelotas RS Capão do Leão96160-000 Brazil Post-Graduate Program in Physics Federal University of Pelotas RS Capão do Leão96160-000 Brazil Functional Materials Development Center São Carlos Federal University SP São Carlos13565-905 Brazil

NaNbO3 doped with Zn (0.00, 0.02, and 0.05 mmol) was synthesized by the microwave-assisted hydrothermal method. Photocatalytic and antibacterial activities were investigated. X-ray diffraction revealed the coexistence of two orthorhombic symmetries (P21ma and Pbma), with doping promoting a progressive increase in the Pbma fraction. All samples exhibited a fiber-like shape (diameter of ∼200 nm), which remained unchanged with doping. The low Zn content (0.02 mmol) reduced the band gap energy from 3.08 to 2.95 eV. As a result, this sample exhibited superior photocatalytic activity, achieving 100 % RhB dye degradation within 45 min, under UV light. Scavenger tests revealed that hydroxyl radicals, holes, and superoxide radical anions were the main active species involved in the photocatalytic reaction. Additionally, the photocatalyst demonstrated excellent recyclability over three consecutive cycles. Pure NaNbO3 exhibited strong antibacterial activity, completely inhibiting the growth of S. aureus, E. coli, and K. pneumoniae at the tested concentrations. Although the Zn-doped sample also demonstrated antibacterial action, the response was concentration-dependent. This study is the first report on Zn doping in NaNbO3, as well as the first investigation of its antibacterial activity against K. pneumoniae and S. aureus. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Escherichia coli

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Aperture-Coupled Koch Fractal on-Chip Antennas for 60 GHz ISM Band 2

Aperture-Coupled Koch Fractal on-Chip Antennas for 60 GHz IS...

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2nd IEEE MTT-S Latin America Microwave Conference, LAMC 2018

作者： Morais, Samuel Medeiros Araújo Serres, Alexandre Jean Rene Guarany, Ivana Soares Da Silverio Freire, Raimundo Carlos Da Silva, Paulo Fernandes Santana, Ewaldo Elder Carvalho Da Fonseca Silva, Paulo Henrique Post-Graduation Program in Electrical Engineering Federal University of Campina Grande Campina Grande Brazil Post-Graduation Program in Computer Engineering and Systems State University of Maranhão São Luis Brazil Post-Graduation Program in Electrical Engineering Federal Institute of Education Science and Technology of Paraíba João Pessoa Brazil

ISBN: (纸本)9781538673331

This paper presents Koch fractal aperture-coupled patch antennas operating in industrial scientific and medical band at 60 GHz (57 GHz to 64 GHz), for on-chip application. This work is the continuation of the development of aperture-coupled antennas with aperture and patch element built in 2 μm-thick aluminum lying on two layers of silicon with a height of 200 μm. The use of Koch fractal allowed the development of aperture-coupled antennas of greater perimeter with more metal in the patch elements, which promoted an increase in the gain. The observed gain for Koch fractal level 2 was of 10.55 dBi, with a bandwidth of 7.23 GHz, covering the ISM 60 GHz Band, and an increase of less than 10% in total patch dimension. For Koch fractal levels 0 (square), a polarization close to circular was achieved, with an axial ratio less than 6 at resonant frequencies. © 2018 IEEE.

关键词： Natural frequencies

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From nut to Dulce de leche: Development of a vegan alternative – Physicochemical characterization, microbiological evaluation and sensory analysis

Food and Humanity

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Food and Humanity 2023年 1卷 581-588页

作者： de Jesus, Eliane Pompeu Techi Diniz, Luan Gabriel Alves, Vanessa da Silva, Yara Prock Schmitz, Ana Camila Quast, Leda Battestin dos Passos Francisco, Cátia Tavares Tormen, Luciano Bertan, Larissa Canhadas Food Engineering and Food Science and Technology Post Graduation Program Federal University of Fronteira Sul Laranjeiras do Sul Parana Brazil

There is a growing trend in the consumption of plant-based raw materials and the use of nuts is a promising alternative in the development of non-dairy foods. This study aimed to produce vegan Dulce de leche with water-soluble baru and cashew nuts extracts (WSBE and WSCE). The WSBE and WSCE were produced using a nut: water ratio of 1:6 (w/v) with the subsequent addition of sucrose and heat treatment to produce Dulce de leche made with baru and cashew nuts (DLBN and DLCN). The nutritional composition of WSBE, WSCE, DLBN, and DLCN showed significant protein and lipids levels with high profile of monounsaturated fatty acids – MUFA and polyunsaturated – PUFA, and lower saturated fatty acids – SFA, leading to lower atherogenicity and thrombogenicity indexes. The Dulce de leche showed a balanced energy value (kcal) and lower hydroxymethylfurfural (HMF) levels. The sensory acceptance test showed a higher scores for WSBE and DLBN for the attributes evaluated, corresponding to “slightly liked” and “moderately liked” when compared to the WSCE and DLCN, with no differences for the purchase intention, which was classified as “probably would buy, probably would not buy”. Thus, the use of water-soluble nut-based extracts can be an alternative for the development of vegan Dulce de leche, contributing positively to consumer health, animal welfare, and the environment. © 2023 Elsevier B.V.

关键词： Baru nuts Cashew nuts Dulce de leche Non-dairy foods Plant-based

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An evaluation of the corrosion behavior of orthodontic Ni-Ti archwires as a function of residence time the oral cavity

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ECS Transactions 2012年第50期50卷 99-112页

作者： Britto, Káthia M.F. Macedo, Daniel A. Nascimento, Rubens M. Martinelli, Antonio E. Júnior, Hélio S. Materials Science and Engineering Post-Graduate Program Federal University of Rio Grande Do Norte 59072-970 Natal Brazil

The objective of the present study was to evaluate the effect of the residence time in the oral cavity on the electrochemical and microstructural properties of nickel-titanium superelastic and thermoelastic archwires aiming at establishing optimum treatment parameters regarding materials selection and maintenance of orthodontic apparatus. The corrosion behaviour of commercial archwires of different diameters was studied after periods of use from 1 to 3 months in the oral cavity of patients submitted to orthodontic treatment. Electrochemical measurements and scanning electron microscopy (SEM) were performed. The results revealed that the stiffness of superelastic archwires increased upon use, making it unnecessary to replace archwires in the early stages of treatment with the objective of adapting the diameter of the wire. Electrochemical tests suggested extremely high corrosion resistance of the nickel-titanium alloy even in severe acid environment. SEM images revealed limited pit formation concentrated in the archwire-bracket contacts. © The Electrochemical Society.

关键词： Dental orthoses

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Effects of oxygen availability on Nb-Si multilayer processed by plasma transferred arc

Effects of oxygen availability on Nb-Si multilayer processed...

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materials science and Technology 2019, MS and T 2019

作者： Cardozo, Eloisa Pereira D'Oliveira, Ana Sofia C.M. Post Graduation Program on Materials Science and Engineering Universidade Federal do Paraná Curitiba Paraná Brazil Department of Mechanical Engineering Universidade Federal do Paraná Curitiba Paraná Brazil

ISBN: (纸本)0873397703

The need for higher propulsive and thermal efficiency in high temperature equipment has induced the search for materials that can withstand such harsh operating conditions. Within this group, the Nb-Si alloy system offers an attractive set of properties although they still present a challenge regarding the effects of oxygen. To address the role of processing environment on microstructure and oxidation performance of a Nb-Si multilayer, a powder mixture (Nb37wt%Si) were deposited under an argon atmosphere and in air. NbSi2 and Nb5Si3 were identified in multilayers processed with Nb37wt%Si mixture. The argon atmosphere accounts for changes in phase morphology and also for the enhanced oxidation resistance. This behavior can be accounted for by the high solubility of oxygen on silicides, that contributes to entrap oxygen in multilayers processed in air compromising oxidation performance. © 2019 MS&T19®

关键词： 3D printers

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Fabrication and characterization of nano-zirconia produced by aqueous-based tape casting

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materials Today: Proceedings 2017年第11期4卷 11506-11511页

作者： Micheline dos Reis Araújo Wilson Acchar Post-Graduation Program of Science and Materials Engineering Federal University of Rio Grande do Norte (UFRN) Natal Brazil

In this work, aqueous-based tape casting was used to produce nano-zirconia substrates. Rheological properties of the slurries were measured at room temperature. The acrylic-based suspensions showed a pseudoplastic behavior and remained stable and homogeneous. Warm pressing was used to laminate two or more cast tapes, in order to produce SOFC structures. Strength behavior of the sintered and laminates tapes was also evaluated.

关键词： Nano-zirconia Tape casting Rheogical properties

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RJSSim: A reconfigurable job scheduling simulator for parallel processing learning 33

RJSSim: A reconfigurable job scheduling simulator for parall...

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33rd Annual Frontiers in Education, FIE 2003

作者： Góes, Luís F.W. Martins, Carlos A.P.S. Pontifical Catholic University of Minas Gerais Post-Graduation Program in Electrical Engineering Computational and Digital Systems Laboratory Belo HorizonteMG Brazil Pontifical Catholic University of Minas Gerais Computer Science Department Post-Graduation Program in Electrical Engineering Computational and Digital Systems Laboratory Belo HorizonteMG Brazil

ISBN: (纸本)0780379616

In this work, we present and analyze the use of a reconfigurable job scheduling simulator called RJSSim as an aid tool for parallel processing learning. This software is a functional and performance Java-based simulator of job scheduling policies. Our objectives are: to present RJSSim;to show the use of RJSSim and reconfigurability concepts for parallel processing learning. First, we present a prototype of RJSSim and the reconfigurability concept. Then we describe two case studies remarking the main parallel processing concepts and skills students can learn. In the first case study, we analyze two parallel algorithm models. In the second, we do some performance tests among parallel (reconfigurable) scheduling policies and architectures. Then, we analyze the performance through some metrics like response time, idle time etc. Finally we discuss and analyze the use of RJSSim for parallel processing learning. Our main contribution is: an implementation of RJSSim for parallel processing learning. © 2003 IEEE.

关键词： Parallel algorithms

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Environmental Assessment of Used Lubricant Oil in Southern Brazilian Region

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环境核算与管理（英文） 2019年第4期7卷 381-394页

作者： Malaquias Zildo António Tsambe Cássio Florisbal de Almeida Cássia Maria Lie Ugaya Luiz Fernando de Abreu Cybis Institute of Hydraulic Research Post-Graduation Program in Hydric Resources and Environmental Sanitary Federal University of Rio Grande do Sul-Av.Bento Gon(c)alves 9500 Porto Alegre Brazil Federal University of Technology-Paraná Post-Graduation Program in Mechanical Engineering and Materials Av.Sete de Setembro Rebou(c)as-Curitiba 6681 Paraná Brazil

Brazil is currently the sixth world largest lubricating oil consumer,as a result,the sixth largest used lubricating oil (ULO) producer,with an annual ULO production of about one million ***,due to the environmental consequences and also to the large amount of this waste,it becomes necessary to quantify and qualify the impacts resulting from ULO management *** study evaluates,through the life cycle assessment (LCA) methodology,the current ULO management system in southern *** comparisons regarding the environmental performance scenarios were defined with the use of eight impact categories: land use,nonrenewable energy,global warming potential,aquatic acidification potential,aquatic eutrophication potential,human toxicity potential,terrestrial ecotoxicity potential and carcinogens *** LCA was conducted based on Simapro,using the "IMPACT 2002+ for ULO v2.12/IMPACT 2002+" *** scenarios comprised the two ULO management models currently used in *** first,which is designated in the study,by TTrR scenario and the second,regarded as TsTR *** LCA results showed that the re-refine phase,in the TsTR scenario,presents lower impact when compared to the corresponding TTR scenario *** TsTR scenario presented the greatest impacts in seven categories (carcinogens,terrestrial ecotoxicity,land use,eutrophication,global warming,use of nonrenewable energy and acidification),corresponding to about 87.5％ of all the *** the contrary,the TTR scenario presented lower impacts in these seven categories,impacting more on only one category (human toxicity).In relation to transportation,the opposite occurs,transport in the TTR scenario presents a larger contribution,impacting 100％ more than transport in the TsTR *** presence of the transshipment center decreases the amount of re-refining impacts in 87.5％ of the categories in the TTR *** in the TTR scenario contributes relatively more to the fact that

关键词： Life cycle assessment Used lubricant oil ULO management

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Ionic oxidation in cathodic cage of titanium CP grade II

Ionic oxidation in cathodic cage of titanium CP grade II

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作者： Vitoriano, Jussier Oliveira Braz, Danilo Cavalcante Barbosa, Geovani Ferreira Araújo, Francisco Odolberto Alves, Clodomiro Post-Graduate Program in Materials Science and Engineering Universidade Federal Rural do Semi-Árido Brazil

Titanium oxides such as rutile and anatase, are materials that stand out for exhibiting properties that act in biomedical and photocatalytic applications, among others. It is extreme importance to idealize new techniques that produce such compounds, being indispensable the improvement of characterizations for these materials. For this purpose, titanium comercially pure (CP) grade II cylindrical samples were oxidized ionically using titanium cage electric shields, oxidized at 350 ° C in 3 and 8 hours. Through Grazing Incidence X-ray Diffraction (GIXRD) analysis, was observed on the surface of the treated samples the formation of a TiO2 film with the anatase, rutile and brookite phases, the latter phase cited being difficult to produce in conventional thermochemical treatments. All samples treated showed a significant increase in wettability using distilled water. The higer value was for the sample with a 8 hours treatment time, in which this condition presented phases with greater intensity in the analysis of GIXRD. © 2017 Universidade Federal de Sao Carlos. All rights reserved.

关键词： Titanium dioxide

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